Assighob to the bbaun



0. I. MARVIN.

GAS GENERATING APPARATUS.

APPLICATION FILED I'EB. I5, 19w.

HIII

IIIIHIIHII htented A11 1, 1916.

IN VEN TOR.

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A TTORNE Y5.

I a gas generating apparatus of' simple and iii nov

..Ai1gel es, and State of California, have incontinues a. nenvi-n, or os assures,

CALIFORNIA, ASSIGNOB, TO THE BRAUN EUBEOKMATEON, :OF LUS Ahl'G-ELES, CALIEOENIA, A COBEORA'IION OI CALIFORNIA.

GAS-GENERATING APIATUS.

To alt wiwm it may concern Be it known that I, Counnmus J. MARVIN, a citizen of the United'states, and a resident of the city of Los Angeles, coumty of lzos vented a certain new anduseful Gas-Gen crating Apparatus, of which the follow ng is a specification. v The invention relates to apparatus for generating gas to be used for the fumigation of trees'and other purposes.

An objectof the invention isto prov de improvedconstruction. Another object of the invention is to provide a gas generating apparatus by'wl'nch definite measured quantities of gas r'nay he generated. a r

-it. further object of the invention is to provide a generating-- apparatus which is freefrom the COI'lOSlVG action of the reagent further object of the invention nov1s1on?'=' of i.

employed in generat ng the gas.

provide an apparatus in. which 4 is miide for reventing the condensation the generated gas. p I

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description; where I shall outline in full that form of the invention which I have selected for illustration in the drawings accompanying a d forming part of the present specification. u said drawings 1 have shown only one s Jecific form of my generic invention,1 but it is tobe understood that I do not'limit inyself to such form, because my invention may be embodied in a multiplicity of forms, each being a species of my sald invention. It is also to be understood that by the claims succeeding the description of inyinvention, I desire to cover the invention in whatever formdt may beembodied. Referring to the said 'drawings: Figure 1 is an elevation of the generating apparatus of my invention arranged on wheels so that it may be readily transported. Fig. 2 1s a side elevation of a portion of the apparatus.

' Fig. 3 is a vertical section of the generating chamber. Fig. 4: is a detail, in section, of the pumpcylinder and piston. Fig. 5 is a detail in perspective of the means for vary mg and limiting the charge of the reagent employed. I

The present apparatus is pantioularly v specification of Letters Patent. Application filed February 195L319 15. Serial No. 844A).

Patented Aug. 1, ieie.

drocyanic gas for the fumigation of citrus trees, but it is obvious that it may be employed forthe' generation of other gases for :the same and other purposes. In such tree quantities of sulfuric ac1d and'an alkali metal cyanid, preferably potassium or sodium cyanid or an alkaline earth metal:

cyanid, preferably calcium cyanid. Heretofore', measured quantities of sulfuric acid and potassium cyanid solution suficient to produce the desired charge of gas, have been flowed into a receptacle, but grcatdifficul ties have been encountered on account of the corrosive action of the acid on the pipes and valves. In accordance with my inven-- tion I place a large quantity of sulfuric acid 1n a receptacle and add thereto successive charges "of cyanid solution until the sulfuric acid has'been completely exhausted. I also provide positive means for measuring the amount of cyamd solution entered at each charge, so that the for the treatment of be generated.

The apparatus of my invention comprises proper quantity of gas the particular tree may preferably a shell or container formed in' two parts 23 securely bolted together. The shell is divided interiorly into two chambers oncompartments 4 and 7 by the annular Wall, 5, which also forms a neck or extension 6 of the lower compartment 4:. The compartment 4, which constitutes the gas generating chamber, is situated at the lower part of the shell and the annular compart- 'ment 7 is arranged at the upper part of the shell and surrounds-the neck 6 formed by the upright portion of the wall 5. The compart lower. compartment, which compartment is hydrocyanicadapted to be used in the generation of by- 'ment 7 is adapted tocontain the less corro sive reagent WlllCll enters into the gas gencrsolution is added to the already partially spent liquor in the generating chamber; The neck 6 is closed at the top by a domed cover plate 41 which is provided-with bosses having passages l4:.4i3 extending therethrough. These passages are arranged adjacent the sides of the neclr for reasons that will be hereinafter explained. The reagent is introduced into the compartment 7 through the aperture 9 which is normally closed by a plug 12 and the otherreagent is introduced into compartment 4 through the aperture 14:

I which is normally closed by a plug 15.

The shell 2 mounted on wheels 18 so that it may be readily transported, the axles 19 being secured d'ucctly to the shell.- Secured hard lead, which sioned by -the reaction the to the axles are shafts 21 by means of which the apparatus 'is mov'ed and which also hold the shell normally upright. Arranged on the shell near the bottom is a discharge valve 17 through which the spent liquid in the compartment t may be discharged when desired, by opening the valve and tilting the shell. Arranged in the gas generating chamher 4; is a stand pipe 16 preferably formed of registers with the gas discharge outlet at the bottom of the shell. 'lhis pipe 16 extends upward above the lower .or discharge ends of the passages 14-i3, so

that none of the material which is introduced. through these passages may pass directly into the stand pipe. For this purpose the cover plate 41 is preferably domed. The gas generating reaction is somewhat rapid and as the gas is generated. it passes up through. the neck 6, down through the stand. pipe 16 and through the conduit 22 to the tree or other place where it is to be used. The speed of the is quite high during the generation and by abruptlychanging the direction of flow of the gas into the stand pipe, the small particles of liquid carried by the gas are separated out. lhis is a material advantage in hydrocyanic acid gas generation,

because on account of the ebullition occagas otten carries acid which 1s msmall particles of sulfuric jurious to the trees being fumigat generating reaction produces he warms the shell and the stand pipe, the gas is discharged from the apparatus in a beaten condition and does not readily 0011- dense the conduit When hydrocyanic aci gas is generated for tree fumigation which is movable into a groove 39, to lock purposes, the conduit 22 lies on the ground or adj acent'the ground, and by discharging the gas from the bottom of the apparatus a much shorter conduit is necessary than if,

i'1 were discharged from the top and thereby tl e liability of condensation of the gas in the conduit is greatly lessenedng Means are provided for removmgpmdetermined quantities of the reagent from the chamber 7 and introducing them into cham- 75,

26 is arranged a gage glass 27, which. indicates the level of the reagent solution in the barrel 23 which is connected in I between its ends with the lower to the upper part of the chamber 7 by 35 chamber. From the pump barrel the reagent solution is forcedthrough the pipe 28, provided with the check valve 29, into the up per end of the neck 6through the passage 43 and consequentlyinto .the reagent "1n. chamber at. The reagent solution is forcibly introduced into the reagent in the chamber, agitating the reagent and preventing a Stratification thereof, thereby insuring a perfect and uniform gas generation. The

pipe2d extends upward above the level of the solution in chamber t so that the solution cannot siphon over. Arranged 1n the pump barrel. is a hollow apertured piston 31 provided with a spring held valve 82 which unseats as the piston is moved upwardly. 'lhe piston rod 33 extends through the head at the upper end of the pump barrel and is connected to a cross head 34, to which is also connected the guide rods which extend downward along side of the barrel and which are connected at their lower ends to the ring 36 slidabl engaging the outer surface of the barre. Secured to the ring 36 is a handle 37 by means of which the piston is reciprocated n in' the barrel.

Arranged adjacent the pump barrel and parallel thereto is a bar 38 having a plurality of transverse grooves 39 therein, the grooves being preferably regularly spaced and being marked to indicate certain definite amounts of reagent, in the present instance ounces of solid cyanid. Engaging the bar 38 is a" slide All, which is provided with a latch 44.

the slide in any desired position. Secured to the slide is an indicator 45 which points to the amount of-the, charge when the slide is locked in enga ement with a. groove." The side ofthe slide hes in the path of movement of the projection 42 bn the 36 and the. 1 8

Y mosses slide prevents-the piston'from being raised past the position indicated by the slide. In the present instance, Fig. 1, the slide is locked in the groove corresponding to 8 on the scale, thereby limitingthe upward movement of the piston so that a/charge equivalent to eight ounces of solid cyanid is contained in the barrel below the piston, that is, the charge of solution containseight ounces of cyanid. When the handle isdepressed, the charge is forced mto the generating chamber 4:, causing a definite amount of gas to be formed.

The charges of reagent from chamber 7 are introduced successively, as successive volumes of gas areneeded, until' all of the supply of reagent originally contained in the generating chamber 4 has been exhausted,

after which the valve 17 is opened and the shell tipped to discharge the spent liquor. The valve is then closedand another supply of the reagent is introduced into the chamber 4. v I claim:

l. A gas generating apparatus comprising a receptacle containing two separated storage chambers, each adapted to contain a diii'erent reagent, means for removing and measuring a definite quantity of reagent from one chamber and introducing it lnto the second chamber, the reaction between the introduced reagent and a portion of the reagent in the second chamber causing the to j generation of gas, and an outlet in said second chamber for said gas.

2. A gas generating apparatus compris-.

ing a chamber adapted to contain a quantity of acid, a second chamber adapted to contain a quantity of reagent solution and a pump connected at its intakeside' to said solution containin chamber and at its discharge side to sai acid containing chamber whereby charges of solution may be drawn from said solution containing chamber and introduced into said acid containing cham- .'ber into contact with the acid, and a gas ing a chamber adapted'to contain a r outlet to said acid containing chamber.

3. A gas generating apparatus cdmprlsagent, a second chamber adapted to contain nother reagent, and means for wlthdrawing sucgrooves and locking ing a chamber adapted to contain a reagent,

a second chamber adapted to contain another reagent, a pump barrel connected at its intake side to said second chamber and at its discharge side to said first chamber, a piston in said barrel, a bar arranged adjacent said barrel, and adjustable means on said bar for limiting the stroke of the piston.

'6. A gas generating apparatus comprising a chamber adapted to contain a reagent, a second chamber adapted to contain another reagent, a pump barrel connected at its intake side to said second chamber and at its discharge side to said first chamber, a piston in said barrel, means for reciprocating said piston, and means arranged adjacent to said pump barrel for limiting the movement of said piston to a predetermined stroke of less length than the full possible stroke of the piston.

7 A gas generating apparatus comprising a chamber adapted to contain a reagent,

a second chamber adapted to contain another reagent, a pump barrel connected at its intake side with said second chamber and at its discharge side with said first chamber a vvalved piston in said pump barrel, a re connected to said piston and arranged externally of said barrel, a projection on said rod, means for reciprocating said rod, a bar arranged parallel to said barrel provided with a plurality of spaced transverse grooves, a slide engaging said bar, means on said slide for engaging one of said the'slide in position, said slide lying in the path of said pro-. jection.

8. In a gas generating apparatus, a gas generating chamber having an upstanding neck of constricted area and a stand pipe discharging at its lower end exterior-1y of said chamber arranged in said chamber and extending into said neck.

9. Ina gas generating apparatus, agas generating chamber, a passage for introducing a reagent into said chamber and a stand pipe discharging from the chamber at its lower end arranged in said chamber and opening into said chamber above the outlet cessive predetermined charges of reagent/pf said passage.

from one chamber and introducing said charges into the other chamber. '4. A gas generating apparatus comprising a chamber adapted to contain a quantity of reagent, a second chamber adapted to contain a quantity of liquid reagent, a pump connected at its intake side to said liquid reagent containing chamber and at its discharge side to said first chamber and means for varying and limiting the stroke of said pump whereby different predetermined amounts of the liquid reagent may be introduced into said first chamber.

-* 10. In a gasgeneratin a aratus a as generating chamber lUtViig Elb upsthndi iig neck, a plate closing said neck at the upper end, a passage through said plate for the introduction of a reagent into said chamber, a stand pipe discharging from said chamber at the lower end arranged in said chamber and opening into said neck above the outlet of said passage.

11. A gas generating apparatus comprising a receptacle adapted to contain a reagent, 7

an annular chamber formed in the upper part of said receptacle adapted to contain another reagent, the inner wall of said aneiiid' chember nuiar chamber-forming ages passage from said receptacle, and means for conveying nredeterinined charges of reagent from said annular chamber to heid receptacle.

12. A gas generating apparatus compris-j ing at receptacle adapted to contain a reagent, at neck: on said receptacle, an annular che1noer surrounding said neck adapt-e11 to contain e iiquici reagent, a conductor connected' to the iower part of said annular chamber and extending. ahovethe level of the liquid in'seid chamber and. passing into eeid neck, e pum arranged. in said conductor adapted to measure and force charges of said liquid into eeid receptacle, and a gas outiet. at the upperv end oi; said neck.v

13-. A, generating apparatus coniprie leg at chamber adapted. to contain a quantity of reagent end means for forcibly intrcriucing a charge of another reagent into whereby the reagent said chamber-is agitate 1 v 142, gee generating apperatus' compris e reagent,

, day of February iee ing a, chamber adapted to contain a quantity of a reagent, :1 second chamber edaptefi to contain another reagent and means for Withdrawing successive charges of reagent from one chamber and forcibly introduc ing them into the reagent in the other chumher,

A 15. A gas generating apparatus, comprising a storage chamber adapted to contain a second closed storage chamber having a constricted outlet'a-nd a iapteui to contain another reagent, a measuring chemv her in communication with both of saint first and. second chambers whereby successivepredetermined charges of reagent from the first chamber may he said iie'coml chamber,

In testimony whereof, my handet Les Angeies,

, CORNELTUS J) MARVIN.

In presence cat- WM, KENNEDY, H. D, t/ieemnnon.

I have hereunto set California, this 6th introduced into 

